Forgotten Key Prevention Function

If the driver's door is locked while it is open

Fig 1: Forgotten Key Prevention Function Timing Pattern

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

If the driver's door is locked while it is open and when the key is still in the ignition key cylinder, approximately 0.3 second later the ETACS-ECU activates the unlock relay output for 0.25 second to prevent the door from being locked with the key inside the vehicle.

In addition, if locking the door was not prevented, a re-try current is sent (an unlock relay output ON is sent for 0.25 second up to 5 times including the first attempt).

NOTE: The dotted line indicates that the system is trying to turn on the unlock relay if the door cannot be unlocked.

If the front passenger's door is open when it is locked with the driver's door switch

Fig 2: Front Passenger's Door Lock Relay & Unlock Relay Output Timing Pattern

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

If the passenger's door or driver's door are locked while the passenger's door is open and when the key is still in the ignition key cylinder, approximately 0.3 second later the ETACS-ECU activates the unlock relay output for 0.25 second to prevent the door from being locked with the key inside the vehicle.

In addition, if locking the door was not prevented, a re-try current is sent (an unlock relay output ON is sent for 0.25 second up to 5 times including the first attempt).

NOTE: The dotted line indicates that the system is trying to turn on the unlock relay if the door cannot be unlocked.